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AA damage: IE > Penetration

I have a lot of doubt in these figures. You claim that ie is more efficient at every armor level?
Even if I haven't done the figures, that's pretty obviously wrong.
The pretty much optimal late game build just for aa's is IE, BT, LW, PD, +boots.

The only possible argument you could have is whether to go BT or IE first.
And the answer for ADCs that DO NOT have much in terms of damage scaling abilities is IE. Meaning BT is the better buy most of the time.

As a first buy IE will give you 7 more DPS without the lifesteal. BT gives you less DPS but because of your damage scaling abilities you will deal more damage.
Carries that like BT first over IE, will like LW as a second buy, over IE.

Basically if you're Caitlyn/Tristana/Ashe you need the multiplicative scaling of AS/Crit, so you build IE PD/SS. Everyone else should be taking BT/LW as their first buys.

I've made and been messing with an excel sheet. Using Draven stats at level 18 with 17/13/0 masteries and pen marks and quints. From my numbers, talking pure aa damage (my model isn't intricate enough for abilities yet), Adding IE (or a second IE even) always does more damage than adding LW or BC.

I'm taking care to watch for uniqueness of the critical damage modifier and everything... Yet it seems no matter what that if you can afford IE you should always purchase it over penetration.(until you hit 100 critical chance)

So for top damage of aa I've got:

Berserk boots, bt, pd, ie, ie, pd (2nd pd turns out to be marginally more dps than a 3rd ie)

Technically ie should be before everything, but I like bt and pd first. I've gotten the same results from 40 Armor up to 250.

Thoughts?

Your setup is massively incorrect. I can think of no less than three pros I have watched stream that have actually shown the math they're using and demonstrate just how ridiculous buying another IE would be.

If you want people to believe what you're saying, go ahead and post your math. Of course, better put your ego in your back pocket when you do, because several people on this forum that are actually good at math will shred your calculations to show you just how wrong you are.

I have a lot of doubt in these figures. You claim that ie is more efficient at every armor level?
Even if I haven't done the figures, that's pretty obviously wrong.
The pretty much optimal late game build just for aa's is IE, BT, LW, PD, +boots.

Almost anything is better than a second IE. And by almost, I mean not almost because everything is better.

In terms of 4 item raw DPS on a zero armour target I have no doubt that IEPDPDBT is the best. A second IE is actually not the worst choice (or even close) as much as you would like to believe, LW is just better.

Your setup is massively incorrect. I can think of no less than three pros I have watched stream that have actually shown the math they're using and demonstrate just how ridiculous buying another IE would be.

If you want people to believe what you're saying, go ahead and post your math. Of course, better put your ego in your back pocket when you do, because several people on this forum that are actually good at math will shred your calculations to show you just how wrong you are.

I'm not having an ego, I just found something that I found strange and posted it. The error very well could be in my calculations. Unfortunately my work computer does not have Internet so I'm stuck finding alternative means to getting it online. I may have to redo it once I get home and post it then. Hopefully I'll get the same results. If not I know i was in error :P